LanguageUtils.java

package coreservlets.jsf.ss06;

import java.util.ArrayList;
import java.util.List;

import javax.faces.model.SelectItem;

public class LanguageUtils
{
    private static String[] languages = { "Java", "JavaScript", "C#", "C++", "PHP", "Python", "Perl", "Ruby", "Scala" };

    private static List<SelectItem> availableLanguages;

    static
    {
        availableLanguages = new ArrayList<SelectItem>();
        for( String language: languages )
        {
            availableLanguages.add( new SelectItem( language ) );
        }
    }

    public static List< SelectItem > languagesList()
    {
        return( availableLanguages );
    }

    public static List<String> randomLanguages( int numLanguagesToStudy )
    {
        List< String > randomLanguages = new ArrayList<String>();

        for (int i = 0; i < numLanguagesToStudy; i++ )
        {
            randomLanguages.add( languages[ new java.util.Random().nextInt(9 ) ] );
        }

        return randomLanguages;
    }

    public static String findMostPopularLanguage( int index )
    {
        return( languages[ index ]);
    }
}